This sermon explores Joshua chapter 7, emphasizing that God is the hero of His people's story because He does not allow sin to remain in the camp or in our lives. The message examines the account of Achan's sin following Israel's victory at Jericho, showing how one person's disobedience affected the entire community and led to defeat at Ai. The sermon contrasts the seriousness with which God treats sin in the Old Covenant with the grace available through Christ's sacrifice on the cross. It challenges believers to understand that confession of sin actually glorifies God and that victorious Christian living requires dealing with sin in our lives. The message emphasizes that God's holiness demands righteousness, but His love for sinners is demonstrated supremely in the cross of Christ, where Jesus paid the price for sin that we deserved.